A look at seven members of the administration whose futures appear uncertain

WASHINGTON—The White House is bracing for more changes in the administration’s senior ranks following the recent departures of top officials including Secretary of State Rex Tillerson and Gary Cohn, director of the National Economic Council.

President Donald Trump prefaced a further shuffle as he departed for California Tuesday. “I’m really at a point where we’re getting very close to having the cabinet and other things that I want,” Mr. Trump said, hours after announcing via Twitter that he was replacing Mr. Tillerson with...